My primary interest in joining Wikipedia is to influence the definitions given for geometric terms such as radius, arc and circle. As a Machine Technology instructor with over 40 years in the profession of teaching applied math and drafting concepts to beginning machine shop students, I feel I can provide good basic applied definitions of these and other geometrical terms commonly found on drawings and other specifications for mechanical devices. Chipmaker45 (talk) 03:06, 19 June 2013 (UTC)